#include <REGX52.H>

void Delay1ms(unsigned int xms)	//@12.000MHz
{
	unsigned char data i, j;

	while(xms)
	{
		i = 2;
		j = 239;
		do
		{
			while (--j);
		} while (--i);
		xms--;
	}
}

void Delay(){
	Delay1ms(100);
}

void main()
{
	while(1)
	{
		P2 = 0xFE;  // 1111 1110
		Delay1ms(200);
		P2 = 0xFD;  // 1111 1101
		Delay1ms(200);
		P2 = 0xFB;  // 1111 1011
		Delay1ms(200);
		P2 = 0xF7;  // 1111 0111
		Delay1ms(200);
		P2 = 0xEF;  // 1110 1111
		Delay1ms(200);
		P2 = 0xDF;  // 1101 1111
		Delay1ms(200);
		P2 = 0xBF;  // 1011 1111
		Delay1ms(200);
		P2 = 0x7F;  // 0111 1111
		Delay1ms(200);
	}
}
